US6611077B2 - Motor having a commutator - Google Patents

Motor having a commutator Download PDF

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Publication number
US6611077B2
US6611077B2 US09/829,914 US82991401A US6611077B2 US 6611077 B2 US6611077 B2 US 6611077B2 US 82991401 A US82991401 A US 82991401A US 6611077 B2 US6611077 B2 US 6611077B2
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US
United States
Prior art keywords
riser member
commutator
motor
riser
ring varistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/829,914
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English (en)
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US20010048263A1 (en
Inventor
Minoru Yokomizo
Shinobu Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Canon Precision Inc
Original Assignee
Canon Inc
Canon Precision Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc, Canon Precision Inc filed Critical Canon Inc
Assigned to CANON KABUSHIKI KAISHA reassignment CANON KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NISHIMURA, SHINOBU, YOKOMIZO, MINORU
Publication of US20010048263A1 publication Critical patent/US20010048263A1/en
Application granted granted Critical
Publication of US6611077B2 publication Critical patent/US6611077B2/en
Assigned to CANON PRECISION INC. reassignment CANON PRECISION INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: CANON PRECISION INC., HIROSAKI PRECISION INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
    • H02K13/105—Spark suppressors associated with the commutator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/32—Connections of conductor to commutator segment

Definitions

  • This invention relates to a motor having a commutator on which a ring varistor is mountable.
  • the rotor of a motor provided with a commutator simply comprises a construction shown in FIG. 8 the accompanying drawings, i.e., an armature core 11 having a plurality of slots connected to the rotary shaft 6 of the rotor, a commutator 5 fixed coaxially with the rotary shaft 6 and comprising the same number of commutator pieces as the slots of the armature core 11 , and a winding 10 for effecting connection between the commutator pieces and the slots of the armature core 11 .
  • FIGS. 4, 5 and 6 of the accompanying drawings show the vicinity of the commutator 5 of a motor having a commutator according to the prior art on an enlarged scale.
  • the base portion of riser members 1 is fixed to the surface of the commutator 5 concentrically fixed to the rotary shaft 6 of the rotor of the motor.
  • a method of conducting a winding 4 to the riser members 1 there is fusing.
  • This, as shown in FIG. 5, is a method of hooking the winding 4 on the end portion 2 of the riser members 1 which is not the base portions thereof, and thereafter bringing the riser members into close contact with each other at a position 3 and applying a high voltage thereto the thereby weld the close contact portion. Since a high voltage is used, the cover of the winding can be removed at the same time by the heat at this time and this is excellent in efficiency as compared with the step of removing the cover of the winding 4 by the used of soldering iron or the like.
  • FIG. 7 of the accompanying drawings shows the internal circuit of the motor.
  • the commutator 5 comprises a plurality of commutator pieces 50 , and the plurality of commutator pieces 50 are rotated to thereby effect the switching action, but during this switching, a counter-electromotive voltage is produced.
  • This counter-electromotive voltage sometimes reaches several tens of thousands of volts, and in order to prevent an excessive electric current from flowing through the motor by this voltage, a ring varistor 7 is joined to the riser members 1 of the commutator 5 .
  • FIG. 6 shows the joined portions of the varistor 7 on an enlarged scale.
  • One aspect of this invention is to provide a riser member having a base portion fixed to the surface of the commutator of a rotor, a first turned-back portion bent so as to hook the winding of a motor, and a second turned-back portion provided on the side opposite to the base portion with respect to the first turned-back portion, to thereby enable a ring varistor to be supported by the second turned-back portion, and enable the mounting of the ring varistor to be effected easily. Further, when the ring varistor has been mounted, the second turned-back portion is in direct contact with the ring varistor and therefore, bad conduction attributable to soldering can be prevented.
  • FIG. 1 is an enlarged view of a commutator before the fusing of the present invention is effected.
  • FIG. 2 is an enlarged view of the commutator after the fusing of the present invention.
  • FIG. 3 is an enlarged view of the commutator on which the ring varistor of the present invention has been mounted.
  • FIG. 4 is an enlarged view of a commutator before the fusing according to the prior art is effected.
  • FIG. 5 is an enlarged view of the commutator after the fusing according to the prior art.
  • FIG. 6 is an enlarged view of the commutator on which a ring varistor according to the prior art has been mounted.
  • FIG. 7 shows the internal circuit of a motor.
  • FIG. 8 shows the appearances of a rotor.
  • FIGS. 1, 2 and 3 show an embodiment of the present invention.
  • FIG. 1 shows the vicinity of a commutator 5 before fusing is effected on an enlarged scale.
  • the vicinity 2 of the base end portion of a riser member is bent toward the outside of the commutator 5 so as to be capable of hooking a winding 4 and further, the end portion 9 of the riser member which is not the base portion thereof is bent in a direction opposite the region on which the winding is hooked.
  • fusing is effected as in the prior art. That is, the winding 4 is hooked on the vicinity 2 of the base end portion of the riser member, whereafter fusing is effected so that the vicinity of a location at which the end portion 9 of the riser member is bent may closely contact with the base portion.
  • the end portion 9 of the riser member after fusing faces the outside of the diametral direction of the commutator 5 .
  • the end portion 9 of the riser member at this time faces a direction substantially perpendicular to the base portion, and if this riser member 1 is used, the end portion 9 of the riser member is positioned outside of the inner diameter a ring varistor 7 , and it becomes possible to place the ring varistor 7 on the end portion 9 of the riser member.
  • the riser member 1 is uniformly provided along the circumferential direction of the commutator 5 and therefore, the ring varistor 7 is also uniformly supported in the circumferential direction of the commutator 5 by the riser member 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Dc Machiner (AREA)
US09/829,914 2000-04-13 2001-04-11 Motor having a commutator Expired - Lifetime US6611077B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-111685 2000-04-13
JP2000111685A JP2001298910A (ja) 2000-04-13 2000-04-13 ヒュージング機構付コミテータとそれを用いたモータ

Publications (2)

Publication Number Publication Date
US20010048263A1 US20010048263A1 (en) 2001-12-06
US6611077B2 true US6611077B2 (en) 2003-08-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US09/829,914 Expired - Lifetime US6611077B2 (en) 2000-04-13 2001-04-11 Motor having a commutator

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US (1) US6611077B2 (enExample)
JP (1) JP2001298910A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060033398A1 (en) * 2002-07-24 2006-02-16 Joze Potocnik Drum commutator for an electric machine
US7009323B1 (en) * 2004-12-06 2006-03-07 Siemens Vdo Automotive Inc. Robust commutator bar anchoring configuration with dove-tailed features
US20060255898A1 (en) * 2005-05-12 2006-11-16 Mitsubishi Denki Kabushiki Kaisha Ignition coil apparatus for an internal combustion engine
US20130020892A1 (en) * 2011-07-18 2013-01-24 Chun Kit Cheung Commutator
US9819243B2 (en) 2015-12-02 2017-11-14 Hyundai Motor Company Rotor for wound rotor synchronous motor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10209114A1 (de) * 2002-03-01 2003-09-11 Bosch Gmbh Robert Kommutator für eine elektrische Maschine
FR2867602A1 (fr) * 2004-03-09 2005-09-16 Arvinmeritor Light Vehicle Sys Collecteur pour moteur electrique
CN103928811A (zh) * 2014-04-15 2014-07-16 瑞安市双峰换向器有限公司 一种换向器换向片

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833357A (en) * 1987-02-27 1989-05-23 Mabuchi Motor Co., Ltd. Rotor for miniature motors
US5272404A (en) * 1991-03-01 1993-12-21 Mabuchi Motor, Co., Ltd. Miniature motor having a built-up commutator
US5895990A (en) * 1996-07-10 1999-04-20 Johnson Electric S.A. Miniature motor
US6285106B1 (en) * 1999-11-22 2001-09-04 Igarashi Electric Works Ltd. Commutator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833357A (en) * 1987-02-27 1989-05-23 Mabuchi Motor Co., Ltd. Rotor for miniature motors
US5272404A (en) * 1991-03-01 1993-12-21 Mabuchi Motor, Co., Ltd. Miniature motor having a built-up commutator
US5895990A (en) * 1996-07-10 1999-04-20 Johnson Electric S.A. Miniature motor
US6285106B1 (en) * 1999-11-22 2001-09-04 Igarashi Electric Works Ltd. Commutator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060033398A1 (en) * 2002-07-24 2006-02-16 Joze Potocnik Drum commutator for an electric machine
US7009323B1 (en) * 2004-12-06 2006-03-07 Siemens Vdo Automotive Inc. Robust commutator bar anchoring configuration with dove-tailed features
US20060255898A1 (en) * 2005-05-12 2006-11-16 Mitsubishi Denki Kabushiki Kaisha Ignition coil apparatus for an internal combustion engine
US7196606B2 (en) * 2005-05-12 2007-03-27 Mitsubishi Denki Kabushiki Kiasha Ignition coil apparatus for an internal combustion engine
CN1862723B (zh) * 2005-05-12 2010-05-05 三菱电机株式会社 内燃机用点火线圈装置
US20130020892A1 (en) * 2011-07-18 2013-01-24 Chun Kit Cheung Commutator
US9502849B2 (en) * 2011-07-18 2016-11-22 Johnson Electric S.A. Commutator
US9819243B2 (en) 2015-12-02 2017-11-14 Hyundai Motor Company Rotor for wound rotor synchronous motor

Also Published As

Publication number Publication date
US20010048263A1 (en) 2001-12-06
JP2001298910A (ja) 2001-10-26

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